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Trapping and deformation of microbubbles in a dual beam fibre-optic trap.

Skelton, S E*; Sergides, M*; Memoli, G; Marago, O M*; Jones, P H* (2012) Trapping and deformation of microbubbles in a dual beam fibre-optic trap. J. Opt., 14 (7). 075706

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Abstract

We make a numerical study of the trapping forces acting on a shelled microscopic gas bubble in a dual-beam fibre-optic trap and the resulting optically-induced deformation. The gas microbubble is encapsulated by a thin elastic shell and confined within the dark core of an annular beam corresponding to a higher mode of the optical fibre. Using a ray-optics model we evaluate the optical trap spring constants, the trapping efficiency, the total trapping force and the surface stress on the microbubble. By application of elastic membrane theory we then evaluate the resulting deformation of the microbubble. We suggest that such an experiment could be a useful tool for quantifying the mechanical properties (elastic modulus) of the shell material.

Item Type: Article
Keywords: optical tweezers, microbubbles
Subjects: Acoustics
Acoustics > Ultrasound
Identification number/DOI: 10.1088/2040-8978/14/7/075706
Last Modified: 02 Feb 2018 13:14
URI: http://eprintspublications.npl.co.uk/id/eprint/5542

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